function fakeAsync(){
  let delay = Math.random() * 1000;
  return new Promise((resolve, reject)=>{
    setTimeout(()=>{
      console.log(`Task use ${delay}ms`);
      resolve(delay);
    }, delay);
  });

}
//console.log('start....');
//(async ()=>{
//  await fakeAsync();
//})();

module.exports = fakeAsync;
